package com.hp.reflect;

import java.lang.reflect.Method;

public class TestReflect09 {
    public static void main(String[] args) throws Exception{
        test01();
        test02();
        test03();
    }

    //普通方式调用
    public static void test01() {
        User user = new User();

        long startTime = System.currentTimeMillis();
        for (int i = 0; i < 100000000; i++) {
            user.getName();
        }
        long end = System.currentTimeMillis();

        System.out.println("普通方式调用10亿次：" + (end - startTime) + "ms");
    }

    //反射方式调用
    public static void test02() throws Exception {
        Class c1 = Class.forName("com.hp.reflect.User");
        User user = (User) c1.newInstance();

        Method getName = c1.getDeclaredMethod("getName", null);

        long startTime = System.currentTimeMillis();
        for (int i = 0; i < 100000000; i++) {
            getName.invoke(user, null);
        }
        long end = System.currentTimeMillis();
        System.out.println("反射方式调用10亿次：" + (end - startTime) + "ms");
    }

    //反射调用，关闭检测
    public static void test03() throws Exception {
        Class c1 = Class.forName("com.hp.reflect.User");
        User user = (User) c1.newInstance();

        Method getName = c1.getDeclaredMethod("getName", null);
        getName.setAccessible(true);
        long startTime = System.currentTimeMillis();
        for (int i = 0; i < 100000000; i++) {
            getName.invoke(user, null);
        }
        long end = System.currentTimeMillis();
        System.out.println("关闭检测方式调用10亿次：" + (end - startTime) + "ms");

    }

}
